1 files changed, 60 insertions, 0 deletions
diff --git a/android/media/update/ApiLoader.java b/android/media/update/ApiLoader.java
new file mode 100644
index 00000000..b928e931
--- /dev/null
+++ b/android/media/update/ApiLoader.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.media.update;
+
+import android.content.res.Resources;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Build;
+
+/**
+ * @hide
+ */
+public final class ApiLoader {
+    private static Object sMediaLibrary;
+
+    private static final String UPDATE_PACKAGE = "com.android.media.update";
+    private static final String UPDATE_CLASS = "com.android.media.update.ApiFactory";
+    private static final String UPDATE_METHOD = "initialize";
+
+    private ApiLoader() { }
+
+    public static StaticProvider getProvider(Context context) {
+        try {
+            return (StaticProvider) getMediaLibraryImpl(context);
+        } catch (PackageManager.NameNotFoundException | ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    // TODO This method may do I/O; Ensure it does not violate (emit warnings in) strict mode.
+    private static synchronized Object getMediaLibraryImpl(Context context)
+            throws PackageManager.NameNotFoundException, ReflectiveOperationException {
+        if (sMediaLibrary != null) return sMediaLibrary;
+
+        // TODO Figure out when to use which package (query media update service)
+        int flags = Build.IS_DEBUGGABLE ? 0 : PackageManager.MATCH_FACTORY_ONLY;
+        Context libContext = context.createApplicationContext(
+                context.getPackageManager().getPackageInfo(UPDATE_PACKAGE, flags).applicationInfo,
+                Context.CONTEXT_INCLUDE_CODE | Context.CONTEXT_IGNORE_SECURITY);
+        sMediaLibrary = libContext.getClassLoader()
+                .loadClass(UPDATE_CLASS)
+                .getMethod(UPDATE_METHOD, Resources.class, Resources.Theme.class)
+                .invoke(null, libContext.getResources(), libContext.getTheme());
+        return sMediaLibrary;
+    }
+}